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author | Werner Pawlitschko <werner.pawlitschko@arcor.de> | 2015-10-27 09:08:04 +0900 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2015-10-27 09:18:34 +0900 |
commit | ababae44108b0e94b58eef6cb5bd830bd040a47f (patch) | |
tree | 48ae676a2075db84e5c0357220d9badc33993cee /tools | |
parent | 298a96c12b2d8fd845ae0c2c21c0a1c0b470f99e (diff) |
x86/ioapic: Prevent NULL pointer dereference in setup_ioapic_dest()
Commit 4857c91f0d19 changed the way how irq affinity is setup in
setup_ioapic_dest() from using the core helper function to
unconditionally calling the irq_set_affinity() callback of the
underlying irq chip.
That results in a NULL pointer dereference for the rare case where the
underlying irq chip is lapic_chip which has no irq_set_affinity()
callback. lapic_chip is occasionally used for the timer interrupt (irq
0).
The fix is simple: Check the availability of the callback instead of
calling it unconditionally.
Fixes: 4857c91f0d19 "x86/ioapic: Force affinity setting in setup_ioapic_dest()"
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions